72716005 has 4 divisors (see below), whose sum is σ = 87259212. Its totient is φ = 58172800.

The previous prime is 72715961. The next prime is 72716011. The reversal of 72716005 is 50061727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50061727 = 479 ⋅104513.

It can be written as a sum of positive squares in 2 ways, for example, as 40157569 + 32558436 = 6337^2 + 5706^2 .

It is not a de Polignac number, because 72716005 - 2⁹ = 72715493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7271596 + ... + 7271605.

It is an arithmetic number, because the mean of its divisors is an integer number (21814803).

Almost surely, 2^72716005 is an apocalyptic number.

It is an amenable number.

72716005 is a deficient number, since it is larger than the sum of its proper divisors (14543207).

72716005 is a wasteful number, since it uses less digits than its factorization.

72716005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14543206.

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 72716005 is about 8527.3679995647. The cubic root of 72716005 is about 417.3912466088.

The spelling of 72716005 in words is "seventy-two million, seven hundred sixteen thousand, five".